Axiom Home Page Forums General Discussion Technical Questions Phase and amplitude correction

There is more unbiased brain power on this forum...not saying the Ascend forum is dumb....there are just more smart people here.

I have a question about phase and amplitude correction for a speaker. Can some one explain this to me in a simple manner?

This is in regards to new product by AV123, and I can not find out technically what it does.

http://forum.av123.com/showthread.php?s=&threadid=2377

thanks,

Curtis, i agree with you. That post on SOCS is dumb or rather the concept of what it apparently does.
The YPAO/MCACC even sounds like a better equalizer design and i don't much care for it either.

dumb or not

I understand the EQ part of the product..that is easy. Why not make it flat to begin with? I also somewhat understand phase correction, but the amplitude part I am missing.

I also wish there was a white paper on the product.

At $1099 each, I'd rather buy new speakers. But I suppose it's people who've already spent well above that amount who'd consider buying it. Hey Saturn! Maybe this will improve your Maggies!

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Hey Saturn! Maybe this will improve your Maggies!

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Ouchie!

On another note why don't you suggest to people who have bought Revel Ultimas, Watt Puppy 7, Kharma Ceramiques and Tannoy Definitions to sell those speaker because they do not have a flat frequency curve like the Axioms and that the Axioms sound much better.....you guys make me laugh.

Laugh it up, fuzzball!

That $1099 is without the SOCS software....I believe that will be anoter $400.

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First off, what is SOCS? Well SOCS is a program that is used with Perpetual Technologies P-1A and it corrects phase and amplitude that plague all speakers. It also will interpolate and up sample redbook CD’s up to a true 24/96 signal. Is it speaker specific? Yes, each P-1A will have to be loaded with the coefficients for your specific speaker that you are using.

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Hmm.. firstly, phase and amplitude don't plague all speakers, they're two components of any audio signal.

By the sounds of this... and this poster could be wrong, it does the following:

1-Upsampling to 24 bits (rather than 16), 96KHz (rather than 44.1) - anyone who remembers their digital theory knows that any bits added (or interpolated mathematically) into a bitstream come at the least significant side, yes, it doubles the number of values that the sample can hold, but the range stays constant. The "additional" sampling rate may or may not be an improvement - again, mathematically they're just creating new samples by averaging out the existing ones - they're not expanding the dynamic range because the Nyquist limit was already set at mastering, everything above 22.05KHz can't be regained, the information is simply not in the bitstream.

2- The speaker coefficient thing... this sounds a lot like Dot Gain in the print industry. My assumption on this is that it adjusts levels (in only 4 different bands, judging by a later quote from the poster) to give a flat response in volume up the amplitude curve. ie: if you send the speaker 50% of full power, and it plays at 40% of full power, the coefficient is 10%... if you send it 20% and it puts out 25%, it would be (-5%).

Not sure that this would have any real-world use, especially at the price listed. It would seem to be just another DSP (digital sound processor) in the chain to take the recorded track, wheedle with it and send it on it's way again.

Bren R.

BrenR....are you in the print business? I am an ex-Xeroid.

Remember...that P1/a does not come with SOCS....that is some add on software.

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BrenR....are you in the print business? I am an ex-Xeroid.

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Design for print and broadcast... I'm on the other side of the plate.

Bren R.